WO2013056930A1 - Roue luminescente, procédé de production d'une roue luminescente et système d'éclairage - Google Patents

Roue luminescente, procédé de production d'une roue luminescente et système d'éclairage Download PDF

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Publication number
WO2013056930A1
WO2013056930A1 PCT/EP2012/068172 EP2012068172W WO2013056930A1 WO 2013056930 A1 WO2013056930 A1 WO 2013056930A1 EP 2012068172 W EP2012068172 W EP 2012068172W WO 2013056930 A1 WO2013056930 A1 WO 2013056930A1
Authority
WO
WIPO (PCT)
Prior art keywords
segments
phosphor
carrier
piece
substrate
Prior art date
Application number
PCT/EP2012/068172
Other languages
German (de)
English (en)
Inventor
Stefan Kotter
Dirk Berben
Original Assignee
Osram Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram Gmbh filed Critical Osram Gmbh
Priority to US14/351,881 priority Critical patent/US20140254133A1/en
Publication of WO2013056930A1 publication Critical patent/WO2013056930A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/38—Combination of two or more photoluminescent elements of different materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • F21V9/45—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity by adjustment of photoluminescent elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/007—Lighting devices or systems producing a varying lighting effect using rotating transparent or colored disks, e.g. gobo wheels
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • Fluorescent wheel method of making a
  • the invention relates to a phosphor wheel with
  • Segment segments that contain phosphor Furthermore, the invention relates to a method for producing the
  • Fluorescent wheel has.
  • LEDs LEDs
  • lasers usually in the form of laser diodes.
  • these light sources emit light in a narrow spectral range, so that their light is practically monochrome.
  • Fluorescent occurring wavelength conversion in turn emit light of a different wavelength.
  • remote phosphor Fluorescent occurring wavelength conversion in turn emit light of a different wavelength.
  • Light source containing phosphor-containing, for example, phosphorus-containing layer usually illuminated by LEDs or laser diodes and in turn emits light of a different color, i. another wavelength, off.
  • this technique can be used to generate corresponding mixed light, such as white light, with blue LED light by admixing yellow light generated by exciting a phosphor-containing, eg, phosphorus, blue light layer.
  • a phosphor-containing eg, phosphorus, blue light layer.
  • Phosphor layers such as cubic silicate minerals
  • Orthosilicates, garnets or nitrides are applied to surfaces of appropriate supports.
  • the phosphor layers are usually mechanically fixed with binders and attached to an optical system (lenses, collimators, etc.), wherein the light coupling can be done for example via air or by means of an immersion medium.
  • an optical system lens, collimators, etc.
  • Phosphors are usually excited by LEDs and / or laser diodes with high light output for emission.
  • the resulting thermal losses are, for example, on the carrier dissipate, overheating and thus
  • Color wheel rotates under an illumination beam, so that with rotating color wheel, the various phosphor layers of an annular path are irradiated sequentially in time, what every single area and thus the
  • the phosphors which are mostly in powder form, form without an additional use of binders,
  • binders are also generally used to bring together the phosphor particles to a phase, which then to appropriate
  • converter elements which consist of a phosphor comprising ceramic or of a phosphor
  • Lighting arrangement such as a projector or other arrangement in which a high illumination density is required, there is a difficulty in providing the relatively large area phosphor wheel evenly and homogeneously with a phosphor layer or a
  • Fluorescent wheel provided, for example, a manufacturing process can be simplified and thus a relatively high quality with low production costs and low waste can be made possible. Furthermore, in various embodiments, a
  • Fluorescent wheel is made with relatively high quality at low cost.
  • the Fluorescent wheel provided.
  • the phosphor wheel comprises a carrier and a plurality of prefabricated and then applied to the carrier individual, assembled
  • the phosphor wheel of individual segments connected via the carrier enables the individual segments and thus the phosphor wheel to be simple and easy inexpensive to produce.
  • several of the segments can be made by separating them from an easily handled and easily manufactured piece of material.
  • the fact that the individual segments are joined together means that the segments are physically independent of each other before assembly, which can be made together, but then isolated, and that the segments are then secured to the carrier and so again on the carrier get connected.
  • the segments are prefabricated and then assembled the prefabricated segments with the carrier to the actual phosphor wheel.
  • the segments are formed and joined together so that at least one segment of a circular path extends over a plurality of adjacent segments.
  • the circular path can be representative, for example, of a light path, over which during operation of the
  • Light beam can continuously irradiate the phosphor and so the phosphor wheel can emit light continuously.
  • the segments have a polygonal structure.
  • the polygonal structure can easily contribute to the fact that the segments can be separated easily and without much waste from the piece of material and after separating and applying the segments to the carrier, the segment of the circular path, for example of the light beam, extends over a plurality of adjacent segments.
  • the segments have a triangular or a trapezoidal structure.
  • the triangular or trapezoidal structure can be particularly In a simple way, the joined segments form a substantially closed surface, forming segments of a circular path on the support, and producing little waste during production.
  • Outer surface of the segments may be formed planar in at least some of the segments.
  • Segments running segments of a circular path sweeps.
  • the assembled segments can form a ring.
  • a midpoint angle of the segments may be, for example, in an angular range between 3 ° and 45 °, in particular in an angle range between 5 ° and 15 °.
  • the center angle can be 6 °. The smaller the center angle, the more individual
  • a first group of the segments comprises a first phosphor which is suitable for generating light of a first color.
  • a second group of segments has a second phosphor suitable for generating light of a second color different from the first color. In this way, with the help of the phosphor wheel light two
  • a third group of the segments comprises a third phosphor suitable for generating light of a third color different from the first and second colors. In this way, with the help of the phosphor wheel light three
  • a fourth group of segments is designed to be reflective. This easily allows the light of the light source with the
  • a plurality of segments having the same phosphor are juxtaposed to form a composite surface of the same phosphor on the support which is larger than the area of one of the segments.
  • Several segments of the same phosphor directly next to each other form a phosphor section.
  • phosphor sections can be arranged side by side, with their phosphors being able to differ from one another.
  • a plurality of reflective segments may be assembled into reflective sections and inserted between two phosphor sections.
  • the segments each have a substrate segment which is coated with a phosphor layer having the phosphor. This contributes to the fact that the segments are particularly easy to produce. In particular, a large piece of substrate can be coated and then the coated substrate segments can be singulated as finished segments. On one of the
  • the substrate segments may comprise metal or coated with a metal layer, for example, the Substrate aluminum or tungsten or from it
  • the substrate is made of highly reflective aluminum
  • the reflective segments can be easily prepared by not coated and only isolated.
  • the segments comprise or are formed from a ceramic.
  • the phosphor is embedded.
  • Segments made of ceramic can have a very high coefficient of thermal conductivity, so that large amounts of energy can be introduced into the segments without damaging the segments. Furthermore, the segments then no longer have to be coated with phosphor.
  • the segments of ceramic may be coated with a metal layer similar to the substrate segments so that they can be secured to the carrier, for example by means of soldering.
  • the segments comprise or are formed from a crystal.
  • the phosphor is incorporated in the crystal structure of the crystal.
  • Crystal segments can have a very high coefficient of thermal conductivity, so that without damaging the segments large
  • Amounts of energy can be introduced into the segments.
  • the segments then no longer have to be coated with phosphor.
  • the segments of crystal may be coated with a metal layer similar to the substrate segments so that they can be secured to the carrier, for example by means of soldering.
  • the segments may be glued to the carrier, for example.
  • the segments have recesses and the carrier has corresponding highlighting, so that the emphasis of the carrier are arranged in the recesses of the segments.
  • the segments have highlighting and the carrier to corresponding recesses, so that the emphasis of the segments are arranged in the recesses of the carrier.
  • the recesses This can help to place the segments on the carrier quickly, easily and accurately.
  • the recesses may be grooves, for example.
  • the segments may be in physical contact with the wearer. For example, only occasionally solder or adhesive can be applied so that other areas are in physical, so in direct contact with each other.
  • the carrier has receptacles for the segments and the segments are
  • Segments are simply inserted into the recordings intended for them. This may alternatively or in addition to the recesses and highlights help to arrange the segments quickly, easily and precisely on the support.
  • the support may comprise or be formed from copper or aluminum. This can help dissipate the heat generated in the segments during operation quickly and effectively via the carrier.
  • the carrier Have cooling elements, for example, cooling fins and / or cooling lines for a cooling medium.
  • a method of manufacturing the phosphor wheel is provided. In doing so, the carrier and a variety of individual segments
  • the segments have phosphor.
  • the segments are applied to the carrier and joined together. Form the phosphor wheel of individual segments which are joined together on the carrier and are then connected to each other via the carrier,
  • the piece of material may, for example, be strip-shaped, in particular formed from an endless strip. This contributes significantly to the particularly simple and inexpensive production.
  • the segments can for example be sawed or cut from the piece of material, for example by means of a
  • the piece of material becomes triangular or trapezoidal segments
  • the ⁇ is a ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • Phosphor layer is coated.
  • the phosphor layer is applied, for example, by doctoring or a printing process. This contributes to a cost effective and
  • the ⁇ is a ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • Substrate piece initially applied to a holding body and then sawn or cut so that individual
  • the substrate segments are coated on the holding body with the phosphor layer and then the
  • coated substrate segments detached from the holding body and thereby separated. Cutting or sawing the
  • Fluorescent layer on the segments is not damaged by sawing or cutting.
  • connection between the holding body and the substrate piece can be produced for example by means of an adhesive, for example a thermo-release adhesive. When separating the segments, this connection is released again.
  • an adhesive for example a thermo-release adhesive.
  • ceramic pieces or crystal pieces having the phosphor can also be connected to the holding body and, after the cutting or sawing, released from the holding body and thus singulated.
  • the piece of material having the phosphor before being singulated or the individual segments after singulation are coated on at least one side with a metal layer.
  • Substrate piece, with the metal layer before separating contributes to the cheap and easy manufacturing process.
  • the metal layer in general can contribute to the
  • the segments are attached to the carrier via the metal layer
  • soldering for example, by soldering or gluing. This contributes to good heat dissipation from the segments to the carrier. For example, solder before dicing on the
  • the segments can be joined together and the carrier can be heated with the segments such that the solder melts and permanently connects the carrier and the segments.
  • the segments can be easily and quickly attached to the carrier, with a good thermal coupling between the segments and the carrier is ensured.
  • the segments may be adhered to the carrier. This allows the attachment of the segments to the carrier in a particularly simple manner, wherein a good thermal coupling between segments and carrier can be achieved when choosing a suitable adhesive.
  • the ⁇ is a ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • the individual segments are applied to the carrier so that the emphasis of the carrier in the recesses of the segments or the emphasis of the segments are arranged in the recesses of the carrier.
  • adhesive can be applied exclusively to the recesses or the elevations.
  • receptacles for the segments in which the segments can be arranged can be formed in the support. For generating light of different colors
  • phosphors can be provided different phosphors and then two or three different groups of segments from the respective pieces of material can be separated and applied to the carrier accordingly.
  • reflective segments can also be produced as a supplement to the segments, isolated and applied to the carrier.
  • further different groups of segments can be produced.
  • a lighting arrangement which comprises the phosphor wheel and an excitation source, for example a light source, which selectively irradiates the segments of the phosphor wheel.
  • An excitation source may comprise, for example, one or more laser light sources and / or one or more LEDs and / or one or more superluminescent diodes.
  • the excitation source may also comprise electromagnetic radiators, for example flash lamps, ultraviolet radiators, infrared radiators, X-ray emitters.
  • the excitation source can also have corpuscular radiators, for example ion and / or electron emitters. For example, one is
  • Lighting arrangement in which the light source generates, for example, pulsed or continuous light, the phosphor wheel rotates, so that the light beam pulls a circular path over the phosphor wheel, in particular the segments.
  • the light source generates, for example, pulsed or continuous light
  • the phosphor wheel rotates, so that the light beam pulls a circular path over the phosphor wheel, in particular the segments.
  • Figure 1 shows a lighting arrangement according to various aspects
  • Figure 2 is a phosphor wheel according to various aspects
  • FIG. 3 shows a phosphor wheel according to various
  • Figure 5 is a phosphor segment according to various aspects
  • FIG. 6 shows a side view of the phosphor segment according to FIG.
  • Figure 7 shows a detail of a carrier according to various aspects
  • FIG. 10 is a flowchart of a method of manufacturing the phosphor wheel according to various embodiments
  • FIG. 11 is a flowchart of a method of manufacturing the phosphor wheel according to various
  • FIG. 12 is a flowchart of a method of manufacturing the phosphor wheel according to various
  • FIG. 1 shows a lighting arrangement 10 according to FIG.
  • a light source 12 which generates a light beam 14
  • a light beam 14 which generates a light beam 14
  • the phosphor wheel has a carrier 16 and a plurality of individual segments 20 mounted on the carrier 16.
  • the carrier 16 is on an axis 18 in a
  • the light source 12 is, for example, a laser diode.
  • the light source 12 may be a light emitting diode (LED) or another light source, such as a diffused light source.
  • the carrier 16 may include a cooling device, such as cooling fins or cooling pipes for a
  • the illumination arrangement 10 can also have a plurality of light sources 12.
  • the light beam 14 is mounted on the carrier 16
  • the light source 12 illuminates or irradiates the segments 20.
  • the light source 12 is a predetermined distance from the segments 20 and thus is not in physical contact with the segments 20.
  • the light beam 14 excites phosphors in the segments 20, so that the Segments 20 in turn emit light rays 22.
  • the color of the light rays 22 depends on which
  • Segments 20 are illuminated, which in turn is from a
  • Position or angular position of the carrier 16 depends.
  • pulsed light can be generated and tuned with an angular position and / or rotational speed of the phosphor wheel, wherein for tuning the angular position or the
  • Rotation speed for example, a motor for rotating the carrier 16 is driven.
  • a rotational frequency of the carrier 16 may be 120 Hz, for example.
  • the lighting assembly 10 may be part of a projector, beamer, or other device that benefits from high luminance.
  • the segments 20 have, for example, phosphor coatings or ceramic or crystal segments in which phosphors are embedded or incorporated. The used phosphor can in different
  • Embodiments be a phosphor mixture which comprises a mixture of different phosphors, whereby, for example, light can be generated, which combines several different colors.
  • Phosphors are known in the art. usual
  • Phosphors are, for example, garnets, silicates, nitrides, oxides, phosphates, borates, oxynitrides, sulfides, selenides, and halides of aluminum, silicon, magnesium, calcium, barium, strontium, zinc, cadmium, manganese, indium or tungsten and other transition metals, or Rare earth metals like
  • an activator such as copper, silver, aluminum, manganese, zinc, tin, lead, cerium, terbium, titanium, antimony or europium.
  • the phosphor is an oxidic or (oxi-) nitridic phosphor, such as a garnet, orthosilicate, nitrido (alumo) silicate or Nitridoorthosilikat, or a
  • Halide or halophosphate Concrete examples of suitable phosphors are
  • Yttrium Aluminum Garnet Cerium (YAG: Ce) or CaAlSiN3: Eu.
  • particles with light-scattering properties and / or auxiliaries may be included.
  • the phosphor segment may comprise a matrix material that
  • diamond or Al 2 O 3 may have. if the Segments 20 are formed wholly or partially of a crystal, these crystals may be single crystals.
  • a light source 12 for example, in different combinations with other materials, serve, in which case a light source 12 can be used, which generates very short-wavelength light.
  • FIG. 2 shows a plan view of the phosphor wheel from the perspective of the light source 12.
  • On the carrier 16 is a multiplicity of individual segments 20 having phosphor
  • segments 201 of a first group, segments 202 of a second group and segments 203 of a third group are circular or
  • the segments 20 of one of the groups arranged next to one another on the support 16 may also be referred to as a phosphor section.
  • the juxtaposed segments 201 of the first group on the carrier 16 form a first one
  • reflective segments 30 are arranged on the carrier, which complete the circular shape or ring shape and form two reflective sections.
  • the segments 201 of the first group have a first phosphor which, when excited by the light beam 14, emits light of a first color.
  • the segments 202 of the second group have a second phosphor which, when excited by means of the
  • Segments 203 of the third group have a third one
  • Phosphor which emits light of a third color when excited by the light beam 14.
  • the reflective segments reflect the light when irradiated
  • Light source 12 which may be white or colored, for example, blue, so that the reflected light may be white or colored, especially blue.
  • the first color may be red
  • the second color may be green
  • the second color may be green third color blue, whereby an RGB color space can be displayed.
  • the colors cyan, magenta and yellow are produced.
  • the segments 20 are for example polygonal, for example trapezoidal.
  • Segments ie the angle which the mutually oblique sides of the trapezium include in their extension, can in an angular range between 3 ° and 45 °, in particular
  • a width and a height of the segments 20 depends on the size of the carrier 16, the placement on the carrier 16, the center angle and the number of segments per
  • the width may be, for example, between 3 mm and 10 mm or between 1 mm and 25 mm, and the height may be, for example, between 5 mm and 10 mm or between 1 mm and 50 mm.
  • the width of the longer parallel sides of the trapezoidal segments 20 may be 3.14 mm at a center angle of 6 ° and a phosphor wheel diameter of 33 mm.
  • the assembled segments 201, 202, 203 together with the reflective segments 30 form in a first approximation a closed ring having a closed ring surface.
  • the joined segments 201, 202, 203 and / or the reflective segments 30 may form only one or more segments of a ring.
  • Ring surface extends a circular path 24, which is representative of a line which sweeps over the light beam 14 when the phosphor wheel rotates.
  • a segment of the circular path 24 extends over a plurality of the segments 20.
  • the segments 20 are preferably formed with respect to their geometric shape and size so that the circular path 24 lies completely within the ring surface, preferably a
  • Diameter of the light beam 14 is taken into account.
  • the dimensions of the segments 20 in FIG. 1 are taken into account.
  • the radius of the circular path 24 and / or the beam diameter of the light beam 14 are selected, for example, such that the
  • Light beam 14 in operation at any time over the segments 20 and / or the reflective segments 30 extends.
  • FIG. 3 shows the phosphor wheel according to various
  • Segments 20 are generated.
  • the segments 204, 205 of the fourth and fifth groups together with triangular reflective segments 32 approximately form a closed circular area.
  • the circular path 24 runs completely within this circular area.
  • FIG. 4 shows the phosphor wheel according to various
  • segments 209, 210 are formed triangular and wherein two geometric varieties of
  • Segments 209, 210 are arranged. The two
  • Different types of segments 209, 210 form on the carrier 16 a plurality of phosphor sections and are
  • the inner segments 210 are made smaller than the outer segments 209.
  • the inner and outer segments 210, 209 differ in the angle that opposes their respective bases. That is how it is
  • Reflective sections 34 may be formed, for example, in that the carrier 16 itself has a reflective effect, so that simply no segments, in particular segments 20, are applied to the carrier 16 in the corresponding areas.
  • reflective segments 30, 32 may be arranged.
  • Figure 5 shows a view of an underside of one of
  • the underside of the phosphor segment 20 faces the carrier 16 on the carrier 16.
  • the phosphor segment 20 may have a different shape
  • the phosphor segment has a highlight 36.
  • the highlighting 36 is formed, for example cuboid. Alternatively, the highlight 36
  • FIG. 6 shows a side view of the phosphor segment 20 according to FIG. 5.
  • the phosphor segment 20 has a
  • Substrate segment 40 which with a phosphor
  • a thickness of the substrate segment 40 is, for example, less than or equal to 100 ⁇ , less than or equal to 50 ⁇ or less than or equal to 10 ⁇ .
  • the phosphor segment 20 may include or be formed of ceramic or crystal. wherein the phosphor can then be embedded in the ceramic or incorporated in the crystal structure of the crystal and / or can be dispensed onto the phosphor layer 42.
  • the phosphor segment 20 is at least partially coated with a metal layer 37, for example at the highlight 36 and / or outside the highlight 36.
  • the phosphor segment 20 is at least partially coated with a metal layer 37, for example at the highlight 36 and / or outside the highlight 36.
  • Substrate segment 40 may be formed of metal, for example tungsten, and / or comprise on its underside metal.
  • the metal layer 37 or the substrate segment 40 may, for example, comprise or consist of aluminum, in particular reflective or highly reflective aluminum, chromium or copper.
  • a substrate segment 40 made of aluminum on its underside can be coated with copper in a galvanic coating process and / or be designed to be highly reflective on an upper side opposite the underside.
  • Metal layer 37 at the bottom contribute to a good thermal coupling of the phosphor segment 20 to the carrier 16 at. In addition, allow the metal or the
  • the segments 20 can be joined together on the support 16 and then the carrier 16 can be heated together with the segments 20 so that the solder melts and the segments 20 fixedly connected to the carrier 16. Additionally or alternatively, the segments 20 may also be glued to the carrier 16 and / or they may be at least partially in physical contact with the carrier 16. For example, solder can only be applied in the area of highlighting 36, and outside of the highlight, physical contact can be made.
  • FIG. 7 shows a section of the carrier 16 according to FIG.
  • Luminous segment 20 is arranged as intended, so is the emphasis 36 of the phosphor segment 20 in the recess 38 of the carrier 16. This can help to arrange the segments 20 quickly, precisely and easily on the support 16. Alternatively, several can
  • corresponding emphasis 36 and corresponding recesses 38 may be provided. Furthermore, as an alternative or in addition, recesses may be provided on the segments, which correspond to highlighting on the carrier 16. Further, the recesses 38 and highlighting 38 may be provided even with geometrically differently shaped segments 20, for example in triangular.
  • FIG. 8 shows a section of the carrier 16 according to FIG.
  • the receptacle 39 for receiving the segments 20.
  • the dimensions of the receptacle correspond to the dimensions of the segments 20 in such a way that one phosphor segment 20 each can simply be inserted into the receptacle 39, but can no longer slip laterally.
  • the receptacles 39 may be additionally or alternatively formed to the emphasis 36 and recesses 38. Furthermore, the images 39 can also be geometric
  • FIG. 9 shows a material piece 44 on a holding body 50 in a production process for producing the segments 20 according to various exemplary embodiments.
  • the piece of material 44 is, for example, a piece of substrate, a piece of ceramic or a piece of crystal and may, for example, be strip-shaped.
  • the piece of material 44 can be a section of an endless strip and / or have aluminum foil.
  • the piece of material 44 is connected to the holding body 50 connected and held by him.
  • the compound is preferably such that it is detachable without the
  • the piece of material 44 by means of a
  • Holding body 50 and the piece of material 44 are solved. Before releasing the piece of material 44 from the holding body 50, the piece of material 44 along predetermined 46th
  • Sawing or cutting of the piece of material 44 can take place, for example, with the aid of a laser or in an etching process, whereby cutting processes are preferred in which the cut is relatively narrow and thus as little as possible cutting waste arises.
  • Substrate segments 40 may after cutting on the
  • the substrate segments 40 may be first coated and then cut. If the segments 20 have the phosphor having ceramic or the phosphor having crystal, the
  • Material piece 44 is only shown in FIG. 9 so high that only a number of segments can be cut out of it. Alternatively, the piece of material 44 may also be provided so high that it can be made up of several rows of
  • FIG. 10 shows a flow diagram of a method for
  • a step S2 the carrier 16 is produced.
  • Carrier 16 may for example be made of copper or have this.
  • the carrier 16 may be formed, for example, circular or annular and / or
  • the carrier 16 may be provided with one or more cooling devices such as cooling fins or cooling channels for a cooling medium.
  • a step S4 the segments 20 are produced.
  • the production takes place, for example, by providing and processing the piece of material 44 and, for example, with the aid of the holding body 50.
  • a plurality of pieces of material 44 can be produced, each one
  • At least three pieces of material 44 can be produced, which have phosphors with which correspondingly three different groups of segments 20 can be produced, with the aid of which three different colors can be produced accordingly. After separating the segments 20 then segments 20 of all three pieces of material 44 and groups can be applied to a phosphor wheel, with the help of which then in the lighting arrangement 10 light threes
  • Colors can be generated.
  • the number of different colors and groups and thus different pieces of material 44 for a phosphor wheel and the number and color selection of the segments 20 for a phosphor wheel can depend on the lighting arrangement 10, for which the phosphor wheel
  • Material pieces 44 can also be equipped with two or more fluorescent wheels.
  • the segments 20 of different groups can be mass produced regardless of the later application and then later selected for individual applications, assembled and then assembled on one or more of the carriers 16, whereby the
  • corresponding fluorescent wheels are simple and inexpensive to produce.
  • a step S6 the segments 20 are applied to the carrier 16, the segments 20 on the carrier 16
  • Segments 20 may be polygonal, in particular triangular, quadrangular or trapezoidal or have another suitable shape.
  • FIG. 11 shows a method for producing the segments 20 according to various exemplary embodiments, wherein this method can be executed, for example, as step S4 of the method shown in FIG.
  • a step S10 the piece of material 44 is produced.
  • the piece of material 44 from a
  • Phosphorus-containing ceramic is formed and becomes
  • the piece of material 44 for example, a the
  • Holding body 50 are grown. On an underside of the piece of material 44 may in this context the
  • Metal layer 37 are vapor-deposited, for example, a chromium layer and / or copper layer, then thereafter the
  • Segments 20 of ceramic or crystal can be attached to the support 16, for example by means of soldering.
  • Material piece 44 isolated, wherein the piece of material 44 may be supported by the holding body 50 or not, depending on a stability of the piece of material 44.
  • the piece of material 44 may in this context, for example, from
  • Phosphor having ceramic or be formed of the phosphor having crystal Phosphor having ceramic or be formed of the phosphor having crystal.
  • FIG. 12 shows a method for producing the segments 20 according to various embodiments, wherein this
  • Process can be executed, for example, as step S4 of the method shown in FIG.
  • the holding body 50 is provided.
  • the holding body 50 for example, relatively stable and wears as little as possible in the subsequent cutting process.
  • the holding body 50 may for example be designed so that it is reusable.
  • a piece of material 44 is inserted
  • Substrate piece consists for example of an aluminum strip which is separated from an endless aluminum strip.
  • the substrate piece is detachably mounted on the holding body 50 and on the holding body 50 along the
  • Cutting lines 46 cut.
  • the cutting lines may be different, for example, such that triangular segments arise.
  • the substrate segments 40 are optionally placed on the holding body 50 with the phosphor layer 42
  • the substrate segments 40 may be formed, for example, reflective, for example by using highly reflective aluminum, and wherein the substrate segments 40 for producing the reflective
  • Segments 30, 32 do not need to be coated.
  • the segments 20 can be produced by means of printing processes, doctoring methods or tape Casting be coated.
  • the surface to be coated is, for example, straight or flat and can be treated accordingly before the coated, for example so that the
  • Phosphor layer 42 is more homogeneous or better at the
  • Phosphor layer 42 dried, baked and / or cured.
  • coated substrate segments 40 detached from the holding body 50 and thereby isolated, whereby the individual segments 20 arise.
  • the segments 20 may have other geometric shapes and / or may be differently arranged on the carrier 16 and / or
  • the segments 20 may comprise other or further materials and / or be manufactured in other ways.
  • the methods shown may have alternative or additional steps, for example for refining the segments 20.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Inorganic Chemistry (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Led Device Packages (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne une roue d'éclairage comprenant un support (16) ainsi qu'une pluralité de segments (20) individuels préfabriqués et assemblés qui sont montés sur ledit support (16). Au moins quelques segments (20) comportent une substance luminescente.
PCT/EP2012/068172 2011-10-21 2012-09-14 Roue luminescente, procédé de production d'une roue luminescente et système d'éclairage WO2013056930A1 (fr)

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US14/351,881 US20140254133A1 (en) 2011-10-21 2012-09-14 Phosphor wheel, method for producing a phosphor wheel and lighting arrangement

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DE102011084961.0 2011-10-21
DE102011084961A DE102011084961A1 (de) 2011-10-21 2011-10-21 Leuchtstoffrad, Verfahren zum Herstellen eines Leuchtstoffrads und Beleuchtungsanordnung

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